Insole structure

ABSTRACT

An insole structure includes a supporting layer, a buffer layer and a surface layer orderly superposed together. The supporting layer is provided thereon with an intermediate bulgy block, an arch bulgy block and a heel bulgy block. The buffer layer is disposed with an intermediate buffer portion, an arch buffer portion and a heel buffer portion at locations respectively corresponding with the intermediate bulgy block, the arch bulgy block and the heel bulgy block of the supporting layer. By so designing, the insole structure of this invention is able to rectify a user&#39;s foot shape and comfortable in wearing and to produce the insole structure, only need to have the buffer layer directly stuck to the supporting layer, able to greatly simplify manufacturing procedures, shortening labor hours and lower producing cost.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to an insole structure, particularly to one used for correction of a user's foot shape.

2. Description of the Prior Art

A conventional insole employed for improving indisposition of a user's foot includes a base plate 1 stuck thereon with three bulgy blocks 2 at locations respectively corresponding with the middle, the arch and the heel of a person's foot, and a buffer material 3 and a surface material 4 are orderly glued on the bulgy blocks 2. Thus, when the insole is set in a shoe to be used, the bulgy blocks 2 of the insole can respectively support the middle, the arch and the heel of a user's foot for rectifying the user's foot shape to have the center of gravity of the foot transferred to an ankle, able to greatly lower the burden of the user's foot. In addition, the buffer material 3 and the surface material 4 orderly stuck on the bulgy blocks 2 can produce effects of shock absorption and buffering and also can lower foreign body sensation produced by the bulgy blocks 2 to enable a user to wear the insole with comfort.

However, when the conventional insole is to be manufactured, the base plate 1, the bulgy blocks 2, the buffer material 3 and the surface material 4 have to be respectively produced first and then, the bulgy blocks 2 are respectively glued on the base plate 1, and the buffer material 3 and the surface material 4 are orderly stuck to the outer side of the bulgy blocks 2, complicated in manufacturing procedures. Additionally, when gluing the bulgy blocks 2 on the base plate 1, it usually needs to take much time to have the bulgy blocks 2 respectively and precisely stuck to a correct position. Thus, cost in producing insoles is extremely high and hence it is unfavorable for promotion of such products in the market.

SUMMARY OF THE INVENTION

The objective of this invention is to offer an insole structure able to correct a user's foot shape and comfortable in wearing, also low in producing cost and having great economic benefit.

The insole structure in the present invention includes a supporting layer, a buffer layer and a surface layer. The supporting layer is bent into a curved surface to correspond with the shape of a person's foot and has topsides provided with an intermediate bulgy block, an arch bulgy block and a heel bulgy block respectively corresponding to the middle, the arch and the heel of a person's foot. The buffer layer made of material softer than the supporting layer has upper sides disposed with an intermediate buffer portion, an arch buffer portion and a heel buffer portion at locations respectively corresponding to the intermediate bulgy block, the arch bulgy block and the heel bulgy block of the supporting layer. The surface layer is superposed on the surface of the buffer layer.

To produce the insole structure of this invention, only need to have the buffer layer agglutinated together with the supporting layer. When the insole structure is used, the intermediate bulgy block, the arch bulgy block and the heel bulgy block of the supporting layer can respectively and effectively support the middle, the arch and the heel of a user's foot for correcting the user's foot shape and meanwhile, the intermediate buffer portion, the arch buffer portion and the heel buffer portion of the buffer layer can produce marked effects of shock absorption and buffering. Thus, the insole structure of this invention is able to correct a user's foot shape and comfortable in wearing and, compared with the conventional insole that has bulgy blocks respectively stuck to a base plate, the insole structure of this invention can greatly simplify manufacturing procedures, shorten labor hours and lower producing cost, having great economic value and advantageous to be promoted in the market.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to the accompanying drawings, wherein:

FIG. 1 is an exploded perspective view of a conventional insole;

FIG. 2 is a perspective view of an insole structure in the present invention;

FIG. 3 is an exploded perspective view of the insole structure in the present invention;

FIG. 4 is a cross-sectional view of the line 4-4 in FIG. 2;

FIG. 5 is a cross-sectional view of the line 5-5 in FIG. 2; and

FIG. 6 is a cross-sectional view of the line 6-6 in FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A preferred embodiment of an insole structure 100 in the present invention, as shown in FIG. 2-6, includes a supporting layer 10, a buffer layer 20 and a surface layer 30 as main components combined together.

The supporting layer 10 integrally made of ethylene vinyl acetate copolymer (EVA) is bent into a curved surface for corresponding with the shape of a person's foot. The supporting layer 10 has topsides provided with an intermediate bulgy block 11, an arch bulgy block 12 and a heel bulgy block 13 at locations respectively corresponding to the middle, the arch and the heel of a person's foot.

The buffer layer 20 is made of a material softer than the supporting layer 10. In this preferred embodiment, the buffer layer 20 is integrally made of high-density foam and has topsides formed with an intermediate buffer portion 21, an arch buffer portion 22 and a heel buffer portion 23 at locations respectively corresponding with the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13 of the supporting layer 10. Further, the buffer layer 20 has an upper side first disposed with a bulgy portion 24 and then, the intermediate buffer portion 21 is positioned on the bulgy portion 24, which extends toward the heel buffer portion 23 from the intermediate buffer portion 21 and gradually tapers to form a triangular shape. Furthermore, the buffer layer 23 has undersides formed with an intermediate positioning recess 25, an arch positioning recess 26 and a heel positioning recess 27 at locations respectively corresponding to the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13 of the supporting layer 10.

The surface layer 30 is superposed on the surface of the buffer layer 20. In this preferred embodiment, the surface layer 30 is made of synthetic suede.

Referring to FIGS. 2-6, since the supporting layer 10 is formed integral with the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13, and the buffer layer 20 is formed integral with the intermediate buffer position 21, the arch buffer position 22 and the heel buffer position 23; therefore, to manufacture the insole structure 100, only need to have the buffer layer 20 directly stuck to the supporting layer 10. Compared with the conventional mode that has bulgy blocks respectively glued on a base plate, this invention can greatly simplify manufacturing procedures for shortening labor hours and lowering producing cost, having great economic value and favorable for promotion in the market.

In using of the insole structure 100, since the supporting layer 10 is made of EVA and is comparatively hard in texture; therefore, the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13 of the supporting layer 10 can respectively and effectively support the middle, the arch and the heel of a user's foot for correcting the user's foot shape, letting the center of gravity of the foot transferred to an ankle and hence greatly lowering the burden of the user's foot. Moreover, since the buffer layer 20 is made of high-density foam and is comparatively soft in texture; therefore, the intermediate buffer portion 21, the arch buffer portion 22 and the heel buffer portion 23 of the buffer layer 20 can respectively produce an effect of shock absorption and buffering to the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13 and can also eliminate foreign matter sensation produced by the intermediate bulgy block 11 and the arch bulgy block 12 and the heel bulgy block 13. By so designing, the insole structure 100 of this invention is not only able to correct a user's foot shape but comfortable in wearing as well.

One special feature of this invention is that the buffer layer 20 is formed integral with the intermediate positioning recess 25, the arch positioning recess 26 and the heel positioning recess 27. Therefore, when the buffer layer 20 and the supporting layer 10 are to be agglutinated together, the intermediate bulgy block 11, the arch bulgy block 12 and the heel bulgy block 13 of the supporting layer 10 can respectively be engaged in the intermediate positioning recess 25, the arch positioning recess 26 and the heel positioning recess 27 of the buffer layer 20, thus facilitating the buffer layer 20 and the supporting layer 10 to be stuck together precisely for shortening labor hours in manufacturing.

Another special feature of this invention is that the buffer layer 20 has a topside provided with the triangular bulgy portion 24 gradually tapering from the intermediate buffer portion 21 toward the heel buffer portion 23. When a person's foot treads upon the insole structure 100, the intermediate portion of the insole structure 100 will receive comparatively large pressure and at this time, the triangular bulgy portion 24 on the buffer layer 20 can further produce effects of shock absorption and buffering to the middle portion of a person's foot.

In addition, the surface layer 30 made of velvety synthetic suede can increase the texture sense of the insole structure 100 to catch up with nowadays trends for catching the eyes of the youths and enhancing their inclination of using the product. Moreover, the synthetic suede itself is comparatively slippery in texture; therefore, when the insole structure 100 is worn, it will not produce harsh tactile impression, able to elevate comfort in wearing.

Furthermore, when EVA is employed to make up the supporting layer 10 and when the insole structure 100 is to be produced, the supporting layer 10 and the surface layer 30 can be formed in different colors. For instance, the supporting layer 10 can be formed into green while the surface layer formed into yellow. Thus, a user can produce imaginary perception via various colors, letting the user be in a happy mood.

While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention. 

What is claimed is:
 1. An insole structure comprising: a supporting layer bent into a curved surface for corresponding with a person's foot shape, said supporting layer having upper sides provided with an intermediate bulgy block, an arch bulgy block and a heel bulgy block respectively corresponding with a middle portion, an arch portion and a heel portion of a person's foot; a buffer layer made of material softer than said supporting layer, said buffer layer having upper sides disposed with an intermediate buffer portion and an arch buffer portion and a heel buffer portion at locations respectively corresponding to said intermediate bulgy block and said arch bulgy block and heel bulgy block of said supporting layer; and a surface layer superposed on a surface of said buffer layer.
 2. The insole structure as claimed in claim 1, wherein said buffer layer has a topside first provided with a bulgy portion at a location corresponding to said intermediate bulgy block of said supporting layer and then, said intermediate buffer portion is positioned on said bulgy portion.
 3. The insole structure as claimed in claim 2, wherein said bulgy portion extends toward said heel buffer portion from said intermediate buffer portion and gradually tapers to form a triangular shape.
 4. The insole structure as claimed in claim 1, wherein said buffer layer has undersides formed with an intermediate positioning recess and an arch positioning recess and a heel positioning recess at locations respectively corresponding with said intermediate bulgy block and said arch bulgy block and said heel bulgy block of said supporting layer.
 5. The insole structure as claimed in claim 1, wherein said supporting layer is integrally made of ethylene vinyl acetate copolymer (EVA), while said buffer layer is integrally made of high-density foam.
 6. The insole structure as claimed in claim 1, wherein said surface layer is made of synthetic suede. 